71079642 has 24 divisors (see below), whose sum is σ = 154504116. Its totient is φ = 23616576.

The previous prime is 71079641. The next prime is 71079643. The reversal of 71079642 is 24697017.

It is a happy number.

71079642 is a `hidden beast` number, since 7 + 1 + 0 + 7 + 9 + 642 = 666.

It is an interprime number because it is at equal distance from previous prime (71079641) and next prime (71079643).

It can be written as a sum of positive squares in 2 ways, for example, as 70408881 + 670761 = 8391^2 + 819^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71079597 and 71079606.

It is not an unprimeable number, because it can be changed into a prime (71079641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 523 + ... + 11934.

Almost surely, 2^71079642 is an apocalyptic number.

71079642 is an abundant number, since it is smaller than the sum of its proper divisors (83424474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71079642 is a wasteful number, since it uses less digits than its factorization.

71079642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12782 (or 12779 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 71079642 is about 8430.8743318828. The cubic root of 71079642 is about 414.2365447902.

The spelling of 71079642 in words is "seventy-one million, seventy-nine thousand, six hundred forty-two".